`mail.cornell.edu`

DNSSEC	⚠️ Not signed
MX	`mail-cornell-edu.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:c901::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-bl2pr04cu00201.inbound.protection.outlook.com`
		A	2a01:111:f403:c902::16^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-byapr04cu00306.inbound.protection.outlook.com`
		A	2a01:111:f403:c92c::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-dm6pr03cu00401.inbound.protection.outlook.com`
		A	2a01:111:f403:c931::1^{🇺🇸 Microsoft2a01:111:f000::/36}
			PTR	`mail-sa9pr03cu00201.inbound.protection.outlook.com`
		A	40.93.192.1^{🇺🇸 Microsoft40.80.0.0/12}
			PTR	`mail-dm5pr02cu00201.inbound.protection.outlook.com`
		A	52.101.10.1^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-bn6pr02cu00301.inbound.protection.outlook.com`
		A	52.101.194.17^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-ch5pr02cu00401.inbound.protection.outlook.com`
		A	52.101.194.19^{🇺🇸 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-ch5pr02cu00303.inbound.protection.outlook.com`
TXT	`v=spf1 include:spf.protection.outlook.com -all`

`cornell.edu`

	DNSSEC	⚠️ Not signed
	A	128.253.173.241^{🇺🇸 CORNELL-AS128.253.0.0/16 Cornell University Network Engineering Rhodes Hall, 757 136 Hoy Road Ithaca, NY 14853}
	A	128.253.173.242^{🇺🇸 CORNELL-AS128.253.0.0/16 Cornell University Network Engineering Rhodes Hall, 757 136 Hoy Road Ithaca, NY 14853}
	A	128.253.173.243^{🇺🇸 CORNELL-AS128.253.0.0/16 Cornell University Network Engineering Rhodes Hall, 757 136 Hoy Road Ithaca, NY 14853}
	A	128.253.173.244^{🇺🇸 CORNELL-AS128.253.0.0/16 Cornell University Network Engineering Rhodes Hall, 757 136 Hoy Road Ithaca, NY 14853}
	A	128.253.173.245^{🇺🇸 CORNELL-AS128.253.0.0/16 Cornell University Network Engineering Rhodes Hall, 757 136 Hoy Road Ithaca, NY 14853}
	A	128.253.173.246^{🇺🇸 CORNELL-AS128.253.0.0/16 Cornell University Network Engineering Rhodes Hall, 757 136 Hoy Road Ithaca, NY 14853}
	NS	`dns.cit.cornell.edu` ⭐
	NS	`bigred.cit.cornell.edu`
	NS	`cudns.cit.cornell.edu`
	NS	`drdns.cit.cornell.edu`
	NS	`drdns2.cit.cornell.edu`
	MX	`cornell-edu.mail.protection.outlook.com` ⭐
	TXT	`apple-domain-verification=R62yGBLwZW9fUKsm`
	TXT	`google-site-verification=Gh3jhxuBIdlsH1dgfvJhSGS30sk0OFFvel_I9xQkI5c`
	TXT	`Y29ybmVsbA==`
	TXT	`google-site-verification=CauHX8dfnPle2exSgs6k3OuJ_rPzkV1d6n6E9OFJFO8`
	TXT	`adobe-idp-site-verification=f41c9778dd61e0b903e5daff9095300a03eb9ad4a2a7ce435...`
	TXT	`google-site-verification=V6u6xIMwPwKv6d55ZV4VqbkO1mjLlzyvQKkbz4usOM0`
	TXT	`sending_domain44232=26593424e3f9a029c8413a3f66844938dd909eec6d3c1421168e0fa97...`
	TXT	`autodesk-domain-verification=9Y0MrpeHy7LiqjUs0Rpy`
	TXT	`facebook-domain-verification=kiwj4xtbf69jsywfq4nlu7a0z81doz`
	TXT	`v=spf1 ip4:128.253.150.144/30 ip4:128.253.150.158 ip4:128.253.150.176 ip4:128...`
	TXT	`7OT7JRZVY1IKZ8J8U84AK2JX4T0J2BM42TL8LSZLV`
	TXT	`NmwZsJfvHf2DUPwvPqMaLkflPi89l0leQfEkMtPmpxQNqlkPy0anm5LZM/N+sxrW+oJfdGKCyoi/q...`
	SOA	`dns.cit.cornell.edu`nsmaster@cornell.edu serial=3605121602

WOT: SAFE (61/100)
rank #216 globally
rank #5 in the tld
This domain name is associated with Cornell University, an Ivy League research university located in Ithaca, New York. The ".edu" extension signifies that the domain is used for educational institutions, specifically colleges and universities. The Cornell.edu domain is used for the university's website, where one can find information about their programs, research, faculty, and more.WOT: SAFE (95/100)
📈 Tranco rank: #587

Cornell University

Cornell University is a private Ivy League research university founded in 1865 by Ezra Cornell and Andrew (0x4469636b)son White. Guided by its founding vision that "any person can find instruction in any study," Cornell has grown into one of the world's leading academic institutions. The university is headquartered in Ithaca, New York, with an additional campus in New York City (Cornell Tech on Roosevelt Island).

Academic Profile

Classification: Private Ivy League research university and New York's land-grant institution
Student Body: Approximately 25,000+ students across all campuses
Colleges: Multiple schools including Engineering (recently renamed David A. Duffield College of Engineering), Arts & Sciences, Agriculture, Business, Law, and Medicine
Research Focus: Environmental sustainability, agricultural advancement, AI in healthcare, and maritime technology

DNS Infrastructure

Cornell operates its own authoritative DNS infrastructure under the Cornell Information Technologies (CIT) department:

Service	Details
Nameservers	`bigred.cit.cornell.edu`,`cudns.cit.cornell.edu`,`dns.cit.cornell.edu`, plus cloud-hosted DR servers on Microsoft Azure and AWS
Mail	Microsoft 365 (`cornell-edu.mail.protection.outlook.com`)
Web Hosting	Six redundant IPs (128.253.173.241-246) on Cornell's own AS (CORNELL-AS)
DNSSEC	Not enabled (unsigned zone)

The university maintains over 100 subdomains serving various departments, research centers, and administrative functions.

Subdomains

internalmailrouting.mail.cornell.edu

vs-prod-router03.mail.cornell.edu

appmail.mail.cornell.edu

lb-appsmtp.mail.cornell.edu

router9.mail.cornell.edu

bulk.mail.cornell.edu

vs-prod-router04.mail.cornell.edu

vs-prod-router01.mail.cornell.edu

proxy.mail.cornell.edu

exchange.mail.cornell.edu

vs-prod-router02.mail.cornell.edu

appsmtp.mail.cornell.edu

null2.mail.cornell.edu

adminapp.mail.cornell.edu

Same first word

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DNS History

2 records (1 active, 1 former)

●MXmail-cornell-edu.mail.protection.outlook.com2026-02-18 → 2026-05-12 · 3 obs

○ 2018-03-17 03:20:58
● 2026-02-18 12:41:04
● 2026-05-12 20:40:30

○MXmaxima01.mail.cornell.edu2015-08-11 → 2018-03-17 · 4 obs

● 2015-08-11 14:21:56
● 2018-03-17 03:20:58
○ 2026-02-18 12:41:04
○ 2026-05-12 20:40:30

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
edu	a.edu-servers.net, b.edu-servers.net, c.edu-servers.net, d.edu-servers.net...	14 records
cornell.edu	bigred.cit.cornell.edu, cudns.cit.cornell.edu, dns.cit.cornell.edu, drdns.cit.cornell.edu...	5 records

✅ Authoritative Response

Server:52.45.47.12

NS records: bigred.cit.cornell.edu, cudns.cit.cornell.edu, dns.cit.cornell.edu, drdns.cit.cornell.edu, drdns2.cit.cornell.edu

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cornell.edu (unsigned zone)

⏱️ Timing

Total: 309ms | Queries: -

📄 Records

Type	Count	Sample Data
MX	1	`mail-cornell-edu.mail.protection.outlook`
TXT	1	`v=spf1 include:spf.protection.outlook.co`

📌 Glue Records Collected

Total: 19

In-bailiwick: 5 (bigred.cit.cornell.edu, cudns.cit.cornell.edu, dns.cit.cornell.edu...)

Out-of-bailiwick: 14 (a.edu-servers.net, b.edu-servers.net, c.edu-servers.net...)

Analysis

Hierarchy

mail.cornell.edu is the parent of internalmailrouting.mail.cornell.edu, vs-prod-router03.mail.cornell.edu, appmail.mail.cornell.edu, lb-appsmtp.mail.cornell.edu, router9.mail.cornell.edu and a few other host names.

Mail Servers

mail.cornell.edu is handled by a single mail server, mail-cornell-edu.mail.protection.outlook.com.

Host mail-cornell-edu.mail.protection.outlook.com points to eight IP numbers: 2a01:111:f403:c901::1, 2a01:111:f403:c902::16, 2a01:111:f403:c92c::1, 2a01:111:f403:c931::1, 40.93.192.1, 52.101.10.1, 52.101.194.17 and 52.101.194.19.

mail.cornell.edu - robtex.com

mail.cornell.edu

cornell.edu